<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>reflect</title>
</head>
<body>
    <input type="text" id="ele">

    <script>

        // Object.defineProperties

        Reflect.set(ele,'value','喵喵');
        

        // console.log(Object.prototype.toString.call(ele));
        // HTMLInputElement.prototype.aha=function(){
        //     console.log('aha');
        // }
        // console.log(ele.aha());
        ele.addEventListener('change',function(){
            console.log(this.value);
        })
        // ele.value='喵喵';
    </script>
</body>
</html>